TOPIC: Modifying the self-registration text

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Also, we would really like to remove the "first name" and "last name" boxes: all we want to collect is the email address. Is this possible?

We'd really prefer to host the survey on LimeService, so modifying code is out - but can do it if there's no other solution.

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1. Copy the default template
2. On startpage.pstpl, insert this at the end of the HEAD tag:
<script>
$(function(){
$("[name=register_firstname]").parent().parent().hide()
$("[name=register_lastname]").parent().parent().hide()
});
</script>
3. On register.pstpl, replace {REGISTERMESSAGE1} and {REGISTERMESSAGE2} with whatever you want. (This wouldn't work if you needed multiple languages.)

But, I simply want to change the text. I don't see how the translation editor can help.
If I could create new {replacement} fields, that might be something, but as it stands the .php sends the email upon registration and prints the text as defined above to the page.

I think I'd have to alter that function, or alter the text, in order to influence the outcome. Am I wrong?